A Calcium Oxide Sorbent Process for Bulk Separation of Carbon Dioxide. Quarterly Progress Report, April 1993--June 1993 PDF Download

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Languages : en
Pages : 29

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Book Description
This research project is investigating the technical feasibility of a high-temperature, high pressure (HTHP) process for the bulk separation Of CO2 from coal-derived gas. Phase I research, in which an electrobalance reactor was used to establish the technical feasibility of the regenerable sorbent process, was completed in March 1992 and results have been fully described in earlier quarterly reports. In Phase 1, the calcination and carbonation characteristics of three calcium sorbents were studied as a function of calcination and carbonation temperature and pressure, mol fraction CO2 in the carbonation gas, and carbonation background gas composition. Desirable reaction conditions required for high reactivity and good sorbent durability were determined. Multicycle tests consisting of as many as ten complete calcination and carbonation cycles were completed. Indirect evidence which suggested that the water-gas shift reaction occurred simultaneously with CO2 removal was found. Occurrence of the simultaneous reactions created the possibility of a direct one-step process for the manufacture of hydrogen from coal-gas while at the same time separating a concentrated stream of CO2The concentrated CO2 Stream could be quite significant if, in the future, environmental regulations restrict atmospheric CO2 emissions.